Earplug



FIG. 1 is a top perspective view of an earplug, showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken lines in the drawings illustrate the portions of the earplug, which form no part of the claimed design. 

CLAIM The ornamental design for an earplug, as shown and described. 